我在资产文件夹中有一个大型数据库(大约130mb)。但是当我使用rootBundle.load()时,UI会阻塞3-4秒。有解决方案吗
码:
Future<Database> initDb() async {
var databasesPath = await getDatabasesPath();
var path = join(databasesPath, "hadith_db.db");
bool fileExists = File(path).existsSync();
if (!fileExists) {
// Should happen only the first time you launch your application
print("Creating new copy from asset");
// Copy from asset
print("starting root bundle");
ByteData data = await rootBundle.load(join("assets", "hadith_db.db"));
print("starting buffer");
List<int> bytes = data.buffer.asUint8List(data.offsetInBytes, data.lengthInBytes);
print("finished buffer");
await File(path).writeAsBytes(bytes);
}
// open the database
Database db = await openDatabase(path, readOnly: true);
return db;
}
注意:为了显示这些数据我正在使用FutureBuilder
你可以使用dart isolates。 Dart隔离用于并发编程,并创建类似于线程但不共享内存的工作者,它们仅通过消息传递工作。有关更多信息,请参阅:https://api.dartlang.org/stable/2.2.0/dart-isolate/dart-isolate-library.html